fix subprocess handling when killed on timeout
fix subprocess handling when killed on timeout

nzlosh/st2,StackStorm/st2,StackStorm/st2,Plexxi/st2,nzlosh/st2,StackStorm/st2,Plexxi/st2,StackStorm/st2,nzlosh/st2,Plexxi/st2,Plexxi/st2,nzlosh/st2